664562468506 has 8 divisors (see below), whose sum is σ = 1004119934580. Its totient is φ = 329855823648.

The previous prime is 664562468459. The next prime is 664562468543. The reversal of 664562468506 is 605864265466.

It can be written as a sum of positive squares in 2 ways, for example, as 651757509225 + 12804959281 = 807315^2 + 113159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212704961 + ... + 1212705508.

Almost surely, 2^664562468506 is an apocalyptic number.

664562468506 is a deficient number, since it is larger than the sum of its proper divisors (339557466074).

664562468506 is a wasteful number, since it uses less digits than its factorization.

664562468506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425410608.

The product of its (nonzero) digits is 49766400, while the sum is 58.

The spelling of 664562468506 in words is "six hundred sixty-four billion, five hundred sixty-two million, four hundred sixty-eight thousand, five hundred six".